diff --git a/ChangeLog b/ChangeLog
index f679027421..275908aeb4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Jun  8 16:34:20 2007  Tanaka Akira  <akr@fsij.org>
+
+	* ext/zlib/zlib.c (gzfile_s_open): use FilePathValue to support
+	  to_path.
+
 Fri Jun  8 16:11:00 2007  Koichi Sasada  <ko1@atdot.net>
 
 	* eval_jump.h: th->errinfo should clear with nil.
diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index 509935a147..4002b75a5c 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -2287,7 +2287,7 @@ gzfile_s_open(int argc, VALUE *argv, VALUE klass, const char *mode)
 	rb_raise(rb_eArgError, "wrong number of arguments (0 for 1)");
     }
     filename = argv[0];
-    SafeStringValue(filename);
+    FilePathValue(filename);
     io = rb_file_open(RSTRING_PTR(filename), mode);
 
     argv[0] = io;